DESCRIPTION

The ptsname() function returns the name of the slave pseudoterminal
device corresponding to the master referred to by fd.
The ptsname_r() function is the reentrant equivalent of ptsname(). It
returns the name of the slave pseudoterminal device as a null-
terminated string in the buffer pointed to by buf. The buflen argument
specifies the number of bytes available in buf.

RETURNVALUE

On success, ptsname() returns a pointer to a string in static storage
which will be overwritten by subsequent calls. This pointer must not
be freed. On failure, a NULL pointer is returned.
On success, ptsname_r() returns 0. On failure, a nonzero value is
returned and errno is set to indicate the error.

ERRORS

VERSIONS

ptsname() is provided in glibc since version 2.1.

CONFORMINGTO

ptsname() is part of the UNIX 98 pseudoterminal support (see pts(4)).
This function is specified in POSIX.1-2001.
ptsname_r() is a Linux extension. A version of this function is
documented on Tru64 and HP-UX, but on those implementations, -1 is
returned on error, with errno set to indicate the error. Avoid using
this function in portable programs.

SEEALSO

COLOPHON

This page is part of release 3.35 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://man7.org/linux/man-pages/.
2008-09-03 PTSNAME(3)